Imperial Oil Restarts Production at Kearl Oil Sands Mine

Exxon Subsidiary Says Mine’s Production at ‘Pre-Shutdown Levels’

CALGARY, Alberta—Exxon Mobil Corp.’s Canadian subsidiary on Tuesday said it has resumed production at one of its largest oil sands mines “to pre-shutdown levels” after it halted operations in November due to a mechanical problem.

Imperial Oil Ltd. suspended production three weeks ago after detecting a vibration issue in the mine’s core ore-crushing machinery used to extract heavy oil. That forced it to forgo output, which had averaged 92,000 barrels of crude a day in the third quarter excluding a 14-day maintenance window.